InChI=1S/C21H20O12S/c1-30-15-7-12(24)16-11(23)6-14(9-2-4-10(22)5-3-9)32-19(16)17(15)20-21(33-34(27,28)29)18(26)13(25)8-31-20/h2-7,13,18,20-22,24-26H,8H2,1H3,(H,27,28,29)